Home / 72,748.32-100,389-40,915.32

Finding the Fourth Proportional to 72,748.32, 100,389 and 40,915.32

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Solution

The fourth proportional to 72,748.32, 100,389 and 40,915.32 is: 56,461.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,748.32 : 100,389 = 40,915.32 : x
  2. Step 2: Convert to fraction form
    72,748.32/100,389 = 40,915.32/x
  3. Step 3: Cross multiply
    72,748.32x = 100,389 × 40,915.32
  4. Step 4: Simplify right side
    72,748.32x = 4,107,448,059.48
  5. Step 5: Solve for x
    x = 4,107,448,059.48/72,748.32
  6. Step 6: Final answer
    x = 56,461.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.